The space battles are what really make this game awesome in my books. Each side (usually) has a star destroyer (type ship) and a friggot style ship. The SD has the spawn point, starfighter bay, turret command room and sometimes a destroyable warp core. The friggots are destroyable (I think, but they don't seem to do much).
From the launch bay, if you hop into one of the many types of star fighters, or troop transports... you lift off and fly out of the bay and into space. Prepare to dogfight, avoid turret fire, fly around obsticles and shoot anything that moves.
I could go on for hours about the space battles, but I would rather play them. Hope that helps, see you online.